On September 17, a federal lawsuit was filed in the Northern District of Mississippi, charging that the extreme variation in U.S. House districts around the nation violates the 14th Amendment. Some U.S. House seats have almost twice as many inhabitants as certain other U.S. House seats. The case is Clemons v U.S. Department of Commerce, 3:09-cv-104.
One reason there is so much variation in U.S. House district population is because districts must be wholly within a single state. A possible solution for more equal districts would be to increase the number of U.S. House seats. The lawsuit alleges that the Constitution requires some solution, and suggests this one. Here is the 12-page complaint. It was filed in Mississippi because Mississippi districts tend to be more populous than the districts of most states. Thanks to Michael Warnken for the link to the complaint. The case was assigned by Judge W. Allen Pepper, a Clinton appointee.